一种改进的图形电磁计算(GRECO)多次散射计算方法  

A method of improved multiple scattering computation by GRECO

作　　者：白冰[1] 赖涛[1] 赵拥军[1] 秦记东 

机构地区：[1]解放军信息工程大学导航与空天目标工程学院,郑州450001

出　　处：《重庆邮电大学学报（自然科学版）》2015年第1期83-88,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(41301481)~~

摘　　要：雷达目标中存在着大量的二面角结构,而二面角多次散射的贡献是目标远场雷达散射截面积的重要组成部分。针对传统图形电磁计算(graphical electromagnetic computing,GRECO)法中的缺陷,使用几何光学(geometry optics,GO)和物理光学(physics optics,PO)的混合方法完成目标多次散射计算,并提出一种基于最小夹角法的自适应步长搜索算法,对符合多次散射条件像素对的搜索进行了优化。使用该算法计算典型二面角模型和组合模型的远场雷达散射截面积,计算结果准确可信。该方法对目标隐身与反隐身研究以及目标自动识别具有良好的工程应用价值。There are lots of dihedral angle structures in radar target,while the contribution of multiple scattering is an important part of far-field RCS of target. In this paper,multiple scattering of target can be computed by GO / PO hybrid method to make up the defect of traditional graphical electromagnetic computing method. In order to optimize the search algorithm of pair of pixels meeting multiple scattering conditions,a new algorithm of adaptive step based on the law of minimum angle is presented. Far-field RCS of some dihedral angle models and combined model are obtained by the approach coincide with those obtained by others. This method has a good application value of the target stealth and anti-stealth research as well as automatic recognition.

关 键 词：图形电磁计算(GRECO)法 GO/PO混合算法 最小夹角法 自适应步长 

分 类 号：TN955[电子电信—信号与信息处理]